How to determine the content highlighted with the slicing operator?

In Go, the slicing operator is used to obtain a subset of elements from a slice, array, or string.

Syntax: collection[low:high] — returns elements from index low (inclusive) to high (exclusive).

For example, if you have a slice:

arr := []int{10, 20, 30, 40, 50}
sub := arr[1:4] // sub will contain elements with indices 1, 2, 3
fmt.Println(sub) // Will output [20 30 40]

If low is not specified, it defaults to 0; if high is not specified, it defaults to the length of the slice.

Thus, the content selected by slicing is a part of the original collection from low to high-1.